五氮杂菲衍生物（5AP-N(C12)2）中的倒置单三重激发态

IF 2.3 4区物理与天体物理 Q3 PHYSICS, APPLIED Applied Physics Express Pub Date : 2024-05-21 DOI:10.35848/1882-0786/ad4e96

Y. Kusakabe, Katsuyuki Shizu, Hiroyuki Tanaka, Kazuo Tanaka, H. Kaji

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引用次数: 0

摘要

在一种二烷基胺取代的五氮杂萘衍生物 5AP-N(C12)2 中观察到了倒置单三重激发态（iST）的特征，即最低单激发态（S1）的能量低于最低三重态（T1）的能量。瞬态聚光测量结果表明，反向系统间交叉的活化能几乎为零，而系统间交叉则是通过热活化过程进行的。T1 的能量高于 S1，S1 和 T1 之间的负能隙（ΔE ST）为 -37 meV。荧光和磷光光谱也证实了负 ΔE ST 为 -46 - -32 meV。

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An inverted singlet-triplet excited state in a pentaazaphenalene derivative (5AP-N(C12)2)

The characteristic of inverted singlet-triplet excited states (iST), in which the lowest singlet excited state (S1) is lower than the lowest triplet state (T1) in energy, was observed in a dialkylamine-substituted pentaazaphenalene derivative, 5AP-N(C12)2. The transient PL measurements showed that the reverse intersystem crossing has virtually zero activation energy, whereas the intersystem crossing proceeded by a thermal activation process. T1 was located energetically above S1 with the negative energy gap between S1 and T1 (ΔE ST) of −37 meV. Fluorescence and phosphorescence spectra also confirmed the negative ΔE ST of −46 – −32 meV.

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来源期刊

Applied Physics Express 物理-物理：应用

CiteScore

4.80

自引率

8.70%

发文量

310

审稿时长

1.2 months

期刊介绍： Applied Physics Express (APEX) is a letters journal devoted solely to rapid dissemination of up-to-date and concise reports on new findings in applied physics. The motto of APEX is high scientific quality and prompt publication. APEX is a sister journal of the Japanese Journal of Applied Physics (JJAP) and is published by IOP Publishing Ltd on behalf of the Japan Society of Applied Physics (JSAP).